Frozen Blockage

While searching for the source of the extremely low temperatures on …, … has discovered the entrance to an ancient underground structure. Blocking the entrance is a mass of frozen rock and ice seracs that have likely rendered the structure itself inaccessible for millennia. Melting carbon dioxide in the entrance is emitting plumes of gas from various gaps in the blockage. Our equipment indicates a vast complex within; … is confident the source of the extreme cold can be found inside.

The command below will trigger the "Frozen Blockage" event in Stellaris:

When this event fires, you can choose between the following option:

• Break through the blockage.